EP 4326038 A1 20240221 - ENERGY RECOVERY DRIVER FOR PZT ACTUATORS
Title (en)
ENERGY RECOVERY DRIVER FOR PZT ACTUATORS
Title (de)
ENERGIERÜCKGEWINNUNGSTREIBER FÜR PZT-AKTOREN
Title (fr)
CIRCUIT D'ATTAQUE DE RÉCUPÉRATION D'ÉNERGIE POUR ACTIONNEURS PZT
Publication
Application
Priority
- US 202217879066 A 20220802
- US 202318222180 A 20230714
Abstract (en)
A differential piezoelectric actuator-system (10) includes an inductor (L) and driver-circuit (11, 12) having switches (S1-S6) for transferring energy between first and second actuators (PZT1, PZT2) and the inductor, and between a voltage-supply node (Vbatt) and the inductor. Control circuitry (21) determines whether a next phase in which to operate the driver-circuit is a first charging-phase or a first recovery-phase. The first charging-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the voltage supply node to the inductor; and a third sub-phase to transfer energy from the inductor to the second actuator. The first recovery-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the inductor to the voltage supply node; and a third sub-phase to transfer energy from the inductor to the second actuator.
IPC 8 full level
H10N 30/80 (2023.01)
CPC (source: EP US)
H02J 7/0068 (2013.01 - US); H02M 3/158 (2013.01 - US); H02N 2/06 (2013.01 - US); H10N 30/802 (2023.02 - EP US)
Citation (search report)
- [A] US 5691592 A 19971125 - GUNDERSON MARK D [US], et al
- [A] EP 1420466 A2 20040519 - RENAULT SA [FR]
- [A] DE 102013219609 A1 20150402 - CONTINENTAL AUTOMOTIVE GMBH [DE]
- [A] US 6081061 A 20000627 - REINEKE JOERG [DE], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 23188320 A 20230728; US 202318222180 A 20230714